Duplex communication on a single optical fiber
CA 1190334 A · Owner: General Motors Corporation · Inventors: Steele, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, An optical fiber having a square or rectangular cross section provides one mode of optical signal transmission comprising reflection between one pair of parallel sides and a second mode between a second pair of parallel sides perpendicular to the first pair so that two separate channels are obtained in a single optical fiber. A transmitter and a receiver are coupled to each end of the optical fiber so that full time two-way communication can occur without substantial interference.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.